diff --git a/src/backend/postmaster/walsummarizer.c b/src/backend/postmaster/walsummarizer.c
index ec2874c18c..c820d1f9ed 100644
--- a/src/backend/postmaster/walsummarizer.c
+++ b/src/backend/postmaster/walsummarizer.c
@@ -139,7 +139,7 @@ static XLogRecPtr redo_pointer_at_last_summary_removal = InvalidXLogRecPtr;
  * GUC parameters
  */
 bool		summarize_wal = false;
-int			wal_summary_keep_time = 10 * 24 * 60;
+int			wal_summary_keep_time = 10 * HOURS_PER_DAY * MINS_PER_HOUR;
 
 static void WalSummarizerShutdown(int code, Datum arg);
 static XLogRecPtr GetLatestLSN(TimeLineID *tli);
@@ -1474,7 +1474,7 @@ MaybeRemoveOldWalSummaries(void)
 	 * Files should only be removed if the last modification time precedes the
 	 * cutoff time we compute here.
 	 */
-	cutoff_time = time(NULL) - 60 * wal_summary_keep_time;
+	cutoff_time = time(NULL) - wal_summary_keep_time * SECS_PER_MINUTE;
 
 	/* Get all the summaries that currently exist. */
 	wslist = GetWalSummaries(0, InvalidXLogRecPtr, InvalidXLogRecPtr);
diff --git a/src/backend/utils/misc/guc_tables.c b/src/backend/utils/misc/guc_tables.c
index 57d9de4dd9..1e71e7db4a 100644
--- a/src/backend/utils/misc/guc_tables.c
+++ b/src/backend/utils/misc/guc_tables.c
@@ -3293,9 +3293,9 @@ struct config_int ConfigureNamesInt[] =
 			GUC_UNIT_MIN,
 		},
 		&wal_summary_keep_time,
-		10 * 24 * 60,			/* 10 days */
+		10 * HOURS_PER_DAY * MINS_PER_HOUR, /* 10 days */
 		0,
-		INT_MAX,
+		INT_MAX / SECS_PER_MINUTE,
 		NULL, NULL, NULL
 	},